Yarn positioner for textile machines



y 1968 J. w. DUBOIS ETAL 3,383,847

YARN POSITIONER FOR TEXTILE MACHINES Filed Aug. 9, 1966 2 Sheets-Sheet 1 1 m N o INVENTOR. JOSEPH W. DUBOIS HERMAN HRHGSMA B Y JOHN H.NYDAM ATTORNEY May 21, 1968 J. w. DUBOIS ETAL 3,

YARN POSITIONER FOR TEXTILE MACHINES Filed Aug. 9, 1966 2 Sheets-Sheet S 1 N v E N T o R J'osEPH W. Duaous B Y HERMAN HAHGSMA JOHN H. NYOAM United States Patent YARN POSITIONER FOE TEXTILE MACHINES Joseph W. Dubois, North Smithfield, R.I., and Herman Haagsma, Whitinsville, and John H. Nydam, North Uxbridge, Mass., assignors, by mesne assignments, to

John Donald Marshall and Horace L. Bomar, as trustees of The Carolina Patent Development Trust Filed Aug. 9, 1966, Ser. No. 571,319 3 Claims. (Cl. 57-54) ABSTRACT OF THE DISCLOSURE Apparatus for offsetting the running ends of a series of filled yarn packages prior to doffing, having a positioning wire extending slidably between a pair of vertically fixed shafts positioned rearwardly of the row of spindles. The" positioning wire, having an interconnecting tension spring, may be moved, one end at a time, within a single vertical plane.

The present invention pertains to a device for positioning the running end of yarn on textile machines such as spinning frames, twisters or the like.

It is a general object of the invention to provide a yarn positioner device which will displace the running end of yarn to a position whereby interference-free clearance is provided for hand and machine dofiing of wound bobbins.

A further object is that of providing a yarn positioning device which is of simple and inexpensive construction, uncomplicated in its operation and which requires a minimum amount of attention and maintenance.

A still further object is that of providing a yarn positioning device which when moved to perform its intended function will hold the running end of yarn under tension thereby preventing the possibility of its unthreading from its respective ring traveler.

Another object is that of providing a yarn positioning device which when moved to perform its function will automatically control each individual yarn extending from the plurality of bobbins on a complete row of spindles.

Further objects and advantages of the invention will become apparent from the following more detailed disclosure.

Textile machines on which the yarn positioner according to the instant invention is adapted to function include a plurality of rotatable spindles disposed in horizontal alignment with a so-called twister ring individual to each spindle that is mounted on a ring rail that is caused to reciprocate vertically during machine operation.

The upper portion of the machine has provisions for supporting a plurality of supply packages of roving or sliver which in a known manner is caused to pass between drafting rolls and thence built as yarn packages on bobbins that are supported by the rotatable spindles.

Travelers are associated with each twister ring and serve in a well known manner to guide and twist the drafted sliver as it is being built into a yarn package on a bobbin. Upon the completion of building a yarn package on the bobbins, the ring rail stops in its lowermost position and the bobbins are then ready for doffing.

Prior to the instant invention the live or running end of yarn, which is that portion extending from the spindle through the traveler and to the forward set of drafting rolls, extended upwardly to the drafting rolls in close proximity with the newly formed yarn package on the bobbins. If the traveler should be positioned at the front or adjacent the front of the twister ring when dofiing the newly wound bobbins the possibility of interference with and breakage of the running end of yarn is very likely and a common complaint received from operators of these machines.

The mechanism according to the instant invention eliminates this problem by displacing the running end of yarn to a position which avoids any possible interference with either hand or machine dofiing.

This mechanism includes a pair of vertically extending and aligned shaft members disposed adjacent and rearwardly of the ends of the row of rotatable spindles mounted on the frame of the machine. Each shaft member is provided with a selectively slidable collar and these collars are interconnected by a cable member extending therebetween. One end of the cable is attached directly to one of the collars and the opposite endto one end of a coil spring. The opposite end of this coil spring attaches to the other of the two collars and serves to maintain the cable taut between the shaft members. Prior to dofiing a row of newly wound bobbins the collars are moved to their lowermost position on their respective shaft member which also lowers the cable member extending between them. As the cable is lowered it contacts each running end of yarn extending between its respective ring, traveler and drafting rolls and displaces it rearwardly to a position whereby any possibility of interference is eliminated when the bobbins are dotfed either by hand or by machine. Additionally,

a certain amount of tension is placed upon each running end of yarn which prevents it from twisting and looping thereby preventing any possible unthreading from the travelers.

The invention will be described hereinafter in greater detail by reference to the accompanying figures of drawing in which:

FIG. 1 is a view in front elevation of a spinning frame showing the yarn positioner according to the invention applied thereto;

FIG. 2 is a perspective view of the various components comprising the invention showing the means for attachment to a textile machine; and

FIG. 3 is an end view and partially in section of a drafting roll unit showing by means of full and dotted lines the extent of yarn displacement by the yarn positioner and the amount of yarn clearance provided relative to the bobbin which is illustrated in perspective form.

Now referring to the figures of drawing, in FIG. 1 the yarn positioner according to the invention is illustrated as being applied to a spinning frame having supporting framework which includes a head end 10 and a foot end 11 which are interconnected by a spindle rail 12 and a rolls'tand beam 13.

A creel :14 is provided at the top of the spinning frame and is adapted to support a plurality of supply packages of roving or sliver 15.

The roll stand beam 13 supports a plurality of conventional drafting ro'll units generally indicated by numeral 16 and a hinge board 17 which in turn carries a plurality of conventional thread guides 18.

The spindle rail 12 supports a horizontal row of bolster cases 19 each of which carries a spindle whorl 20 for rotating in a conventional manner the yarn bobbins carried thereon which are indicated by numeral 21.

The spinning frame includes a ring rail 22 of conventional design having a plurality of twister rings 23 (FIGS. 1 and 3) fixed thereon which include individual travelers 24 (FIG. 3) for guiding the yarn as it is built into packages on the bobbins 21. The various elements of a spinning frame described to this point are of conventional design and well known to those conversant in the art.

The plurality of lengths of sliver or roving from the supply packages 15 are guided in the usual manner as through their respective drafting roll unit 16, through the plurality of thread guides 18 and thence downwardly to the travelers which guide the yarn as it is twisted and built into packages on toe bobbins 21.

The yarn positioner device according to the instant invention will now be described.

This device which i adapted to displace the running end of yarn during the dotting of newly wound bob ins includes a pair of vertically disposed shaft members '25 26 (F168. 1 and 2) which are p0: ioncd in spaced relation adjacent and slightly rearwardly of the end spindies of the plurality which form the horlzo .al row on the s inning fra e. These shaft members are provided w laterally extending mounting brackets 27 and 2%, respectively, intermediate their ends which are fixedly at achcd by any suitable means such as welding and include apertures (not shown) for assembling said shafts to the roll stand beam by means of bolts 2? and 3%. Each shaft member 25 and 26 is provided with a longitudi; rnovrble collar member 31 and 32, respectiv y, with in egrally formed and inwardly directed cars 33 and 34 which serve as a means for in erconnecting the two collars with a cable member 35. One end of the cable 35 attaches to car 34 as at as and the opposite end attaches to one end of a coil spring 3'? as at 38 (Flu. 2). Each of the collar members 31 and 3 2 is provided with integrally formed and forwardly directed lug elements 39 and 4%, respectively, which serve as a means for manually moving the cable 35 from the upper to the lower position shown in FIG. 3.

In operation, the yarn which is identified by the letter Y in FIG. 3 extends from the drafting roll unit 15, through the thread guide 18 and thence downwardly and through the traveler 24 which functions in a kno vn manner to guide the yarn during spinning and the building of a yarn package on a bobbin 21. Upon completion of the package building On the plurality of bobbins the ring rail stops in its lowermost position and prior to dotting the newly wound bobbins the hinge board 17 and thread guides i3 carried thereby are pivoted to the dotted line position shown in FIG. 3.

Normally in this position the yarn Y would extend angularly downward from the guide 18 directly to the traveler 24 which may have stopped at any point about the circumference of the twister ring 23. This condition places the yarn in very close proximity with the newly formed package oftentimes presenting sufficient interference to cause breakage of the running end when the bobbins are dolled. By simply lowering the collars 5i. and 32 to their lower limits, the cable 35 is lowered accordingly and each running end of yarn Y is contacted and displaced rearwardly from the solid to the dotted line position as shown in FIG. 3 thereby providing interference 4 free clearance for the dotting of the complete row of bobbins by either tie hand or machine method. That end of the cable 35 which is attached to the coil spring 3'7 is provided with a protective sleeve of such material as plastic tubing or the like and prevents those running ends of yarn being contacted by the spring end of the yarn po oner from becoming entangled with said coil spring. Additionally by displacing the yarn as shown in FIG. 3 it is held sufficiently taut so as to prevent any possible chance of its unthreading from the traveler 24.

While one embodiment of the invention has been disclosed, it is to be understood that the inventive concept may be carried out in a number of ways. This invention is, therefore, not to be limited to the precise details described, but is intended to embrace all variations and modifications thereof falling within the spirit of the invention and the scope of the claims.

We claim:

1. For a textile machine adapted to spin sliver into yarn onto bobbins having a frame with a series of drafting rollers worlrably mounted thereon, a plurality of rotatable spindles disposed in a longitudinally extending row on said frame with a series of cooperating twister rings mounted for reciprocation axially of said spin les, 21 yarn depressor for positioning said yarn prior to the doiiing of said bobbins, said depressor comprising vertically extending parallel support members fixedly secured in spaced relation on said frame adjacent and rearwardly of said row of spindles, means interconnecting said support members which is selectively movable through a single vertical plane on the latter from a clear to a yarn engagin position whereby said yarn is depressed to a position to provide clearance for hand and machine cloffing of said bobbias.

2. The mechanism according to claim 1 wherein said means interconnecting said support members includes a selectively movable collar member on each of said shaft members with a cable traversing the distance therebctween.

3. The mechanism according to claim 2 wherein one end of said cable is fixedly attached to one of said collar members with the opposite end thereof being attached to one end of an expansion spring with the opposite end of said spring being attached to the other of said collar members thereby maintaining said cable taut intermediate said vertically extending shaft members.

References Cited UrllTED STATES PATENTS 1,067,815 7/1913 Hinds et al. 5754 FRANK I. COHEN, Primary Examiner. 

